远端告警给模型前恢复每条长度收口

- 新增 DIRECT_TOOL_BRIDGE_WARNING_MAX_CHARS=480 与 bounded_remote_warning(s) helper

- createOrDerive/PrepareGameArt/GenerateImage 三个完成回执的 warnings/sliceWarnings 逐条收口

apps/ai-game-creator-shell/src-tauri/src/agent/direct_tool_bridge.rs

@@ -77,6 +77,26 @@ const DIRECT_TOOL_BRIDGE_MAX_RESOURCE_PAGE_SIZE: usize = 100;
 const DIRECT_TOOL_BRIDGE_MAX_ACCOUNT_ASSET_ID_CHARS: usize = 512;
 const DIRECT_TOOL_BRIDGE_MAX_LOCAL_ASSET_PATH_CHARS: usize = 512;
 
+/// 远端服务告警给模型时每条允许保留的字符数：原文保留，只做长度收口
+/// （与旧 `redact_agent_runtime_error(..., 480)` 的预算一致）。
+const DIRECT_TOOL_BRIDGE_WARNING_MAX_CHARS: usize = 480;
+
+/// 告警原文给模型，只做长度收口。
+fn bounded_remote_warning(warning: &str) -> String {
+    crate::agent::redaction::truncate_agent_runtime_text(
+        warning,
+        DIRECT_TOOL_BRIDGE_WARNING_MAX_CHARS,
+    )
+}
+
+/// 逐条给远端告警做长度收口，顺序与原文一致。
+fn bounded_remote_warnings(warnings: &[String]) -> Vec<String> {
+    warnings
+        .iter()
+        .map(|warning| bounded_remote_warning(warning))
+        .collect()
+}
+
 pub(crate) fn reject_command_output_wrapper(content: &str) -> Result<(), String> {
     let mut lines = content.trim_start_matches('\u{feff}').lines();
     let exit_line = lines.next().map(str::trim).unwrap_or_default();
@@ -2189,6 +2209,8 @@ fn bridge_completed_resource_result(
     let (warnings, slice_warnings) =
         local_project_resource_edit_warnings_at(root, &result.operation_id)
             .map_err(|cause| ResourceCompletionRejection::WarningsUnreadable { cause })?;
+    let warnings = bounded_remote_warnings(&warnings);
+    let slice_warnings = bounded_remote_warnings(&slice_warnings);
     Ok(json!({
         "status": "completed",
         "operationId": result.operation_id,
@@ -2649,8 +2671,8 @@ async fn bridge_prepare_game_art_validated(
             "mode": mode.as_str(),
             "assetPaths": package.asset_paths,
             "slicePaths": package.slice_paths,
-            "warnings": package.warnings,
-            "sliceWarnings": package.slice_warnings,
+            "warnings": bounded_remote_warnings(&package.warnings),
+            "sliceWarnings": bounded_remote_warnings(&package.slice_warnings),
             "resources": resources,
             "derivativePolicy": "新建或重生成的标准图集必须包含四张 canonical 切片；旧可信图集缺少切片时只能按 warning 使用完整图集，不得伪造衍生素材",
             "next": "读取这些相对路径并把合适素材接入核心游戏画面"
@@ -3168,8 +3190,14 @@ async fn bridge_generate_image(
                 "taskId": generated.task_id,
             },
             "resources": resources,
-            "warnings": generated.warning.map(|warning| vec![warning]).unwrap_or_default(),
-            "sliceWarnings": generated.slice_warning.map(|warning| vec![warning]).unwrap_or_default(),
+            "warnings": generated
+                .warning
+                .map(|warning| vec![bounded_remote_warning(&warning)])
+                .unwrap_or_default(),
+            "sliceWarnings": generated
+                .slice_warning
+                .map(|warning| vec![bounded_remote_warning(&warning)])
+                .unwrap_or_default(),
             "sliceMode": generated.slice_mode,
             "gridX": generated.grid_x,
             "gridY": generated.grid_y,